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An atomistic-continuum hybrid simulation of fluid flows over superhydrophobic surfaces
Li Q(李强); He GW(何国威); He GW
Source PublicationBiomicrofluidics
2009
Conference NameConference on Advances in Microfluidics and Nanofluidics
Conference Date2009
Conference PlaceHong Kong Univ Sci & Technol, Hong Kong, PEOPLES R CHINA
AbstractRecent experiments have found that slip length could be as large as on the order of 1 mu m for fluid flows over superhydrophobic surfaces. Superhydrophobic surfaces can be achieved by patterning roughness on hydrophobic surfaces. In the present paper an atomistic-continuum hybrid approach is developed to simulate the Couette flows over superhydrophobic surfaces in which a molecular dynamics simulation is used in a small region near the superhydrophobic surface where the continuum assumption is not valid and the Navier-Stokes equations are used in a large region for bulk flows where the continuum assumption does hold. These two descriptions are coupled using the dynamic coupling model in the overlap region to ensure momentum continuity. The hybrid simulation predicts a superhydrophobic state with large slip lengths which cannot be obtained by molecular dynamics simulation alone.
KeywordCouette Flow Flow Simulation Molecular Dynamics Method Navier-stokes Equations Boundary-conditions Molecular-dynamics Shear-flow Solid Interface Slip Length Liquid Microchannels Velocimetry Roughness Friction
Indexed ByCPCI(ISTP)
Language英语
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/26747
Collection非线性力学国家重点实验室
Corresponding AuthorHe GW
Recommended Citation
GB/T 7714
Li Q,He GW,He GW. An atomistic-continuum hybrid simulation of fluid flows over superhydrophobic surfaces[C]Biomicrofluidics,2009.
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